In this process, gases containing the raw materials are passed through a rotating glass tube, where they are burned by a flame. Stranding and Cable Assembly Individual coated fibers are not used in their bare state; they are integrated into a robust cable structure through a process called stranding.
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The resulting soot is deposited on the interior of the tube, building up layers that eventually melt and collapse into a solid, concentric preform. Jacketing and Final Quality Control The assembled strand is then encased in a final outer jacket, typically made from low-smoke zero-halogen (LSZH) or polyethylene materials.
As the fiber is drawn, a dual-layer coating is immediately applied. This intricate procedure demands precision at every stage, from the creation of ultra-pure glass to the delicate application of protective coatings.
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The mixture is then loaded into a crucible and melted in a controlled oven to produce a preform, a solid glass rod that contains the exact geometric and optical properties required for the final cable. A hard ultraviolet-cured acrylate layer provides initial strength, while a secondary layer offers flexibility and protection against micro-bending stresses.
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